/*!	 curvegradient.h
**	 Header file for implementation of the "Curve Gradient" layer
**
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2007-2008 Chris Moore
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
** === N O T E S ===========================================================
**
** ========================================================================= */

#ifndef __SYNFIG_CURVEGRADIENT_H
#define __SYNFIG_CURVEGRADIENT_H

#include <synfig/vector.h>
#include <synfig/layers/layer_composite.h>
#include <synfig/gradient.h>
#include <synfig/blinepoint.h>

using namespace synfig;
using namespace std;
using namespace etl;

class CurveGradient : public Layer_Composite, public Layer_NoDeform
{
    SYNFIG_LAYER_MODULE_EXT

private:
    // Parameter: (Point)
    ValueBase param_origin;
    // Parameter: (Real)
    ValueBase param_width;
    // Parameter: (std::vector<synfig::BLinePoint>)
    ValueBase param_bline;
    // Parameter: (Gradient)
    ValueBase param_gradient;
    // Parameter: (bool)
    ValueBase param_loop;
    // Parameter: (bool)
    ValueBase param_zigzag;
    // Parameter: (bool)
    ValueBase param_perpendicular;
    // Parameter: (bool)
    ValueBase param_fast;

    Real curve_length_;
    bool bline_loop;

    void sync();

    Color color_func(const Point &x, int quality = 10, float supersample = 0)const;

    float calc_supersample(const Point &x, float pw, float ph)const;

public:
    CurveGradient();

    virtual bool set_param(const String &param, const ValueBase &value);
    virtual ValueBase get_param(const String &param)const;
    virtual Color get_color(Context context, const Point &pos)const;
    virtual bool accelerated_render(Context context, Surface *surface, int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
    virtual bool accelerated_cairorender(Context context, cairo_t *cr, int quality, const RendDesc &renddesc, ProgressCallback *cb)const;
    Layer::Handle hit_check(synfig::Context context, const synfig::Point &point)const;

    virtual Vocab get_param_vocab()const;
};

#endif